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      • KCI등재

        Effect of process control mode on weld quality of friction stir welded plates

        Mostafa Shazly,Sherif Sorour,Ahmed R. Alian 대한기계학회 2016 JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY Vol.30 No.1

        Friction stir welding (FSW) is a solid state welding process which requires no filler material where the heat input is generated by frictionalenergy between the tool and workpiece. The objective of the present work is to conduct a fully coupled thermomechanical finiteelement analysis based on Arbitrary Lagrangian Eulerian (ALE) formulation for both “Force-Controlled” and “Displacement-Controlled”FSW process to provide more detailed insight of their effect on the resulting joint quality. The developed finite element models use Johnson-Cook material model and temperature dependent physical properties for the welded plates. Efforts on proper modeling of the underlyingprocess physics are done focusing on the heat generation of the tool/workpiece interface to overcome the shortcomings of previousinvestigations. Finite elements results show that “Force-Controlled” FSW process provides better joint quality especially at higher travelingspeed of the tool which comes to an agreement with published experimental results.

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